[GAMEPLAY] Can't cast abilities when plugging headphones in game

I'm playing a ranked SR game as Lissandra top on my laptop. I have the usual few applications open (Discord, Chrome, etc) only I start the game with my laptop speakers, not my headphones (I was talking to someone).

About 5 mins later I'm done with the conversation and plug my headphones back in. I instantly disconnect for a couple of seconds and then reconnect. "That's weird" I thought, but I carried on walking back to lane.

When I reach the minion wave I try casting abilities but they wouldn't register (I had no problem before the dc). I look down and see they are all greyed out (like I haven't levelled them up yet) and the mana values were gone. I start to panic because it's a ranked game and quickly unplug my headphones hoping it would reverse the issue.

Thankfully it did. I disconnected for a few seconds like before and once I was back all my abilities were castable again. I continued playing with my laptop speakers and eventually won.

Bad news is I didn't think to take a screenshot but if it happens again I will post it underneath. This is the first time this has happened to me and I will comment if this occurs more frequently.